Betting Odds Calculator
18/1 means that for every £1 you stake, you win £18 in profit if the bet wins. Your stake is returned on top of that, so a £1 bet at 18/1 returns £19 total.
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The implied probability is 5.26%. This means the bookmaker prices this outcome as having roughly a 5.26 in 100 chance of happening.
These are odds against – the potential profit is greater than your stake. The higher the first number relative to the second, the less likely the bookmaker thinks the outcome is.
Winnings Table for 18/1 Odds
| Stake | Profit | Total Return |
|---|---|---|
| £1.00 | £18.00 | £19.00 |
| £5.00 | £90.00 | £95.00 |
| £10.00 | £180.00 | £190.00 |
| £20.00 | £360.00 | £380.00 |
| £50.00 | £900.00 | £950.00 |
| £100.00 | £1,800.00 | £1,900.00 |
Odds Conversion
| Format | Value |
|---|---|
| Fractional | 18/1 |
| Decimal | 19 |
| American | +1800 |
| Implied Probability | 5.26% |
How the Calculation Works
Winnings: Stake x (18 / 1) = Profit. So £10 x (18 / 1) = £180.00 profit.
Probability: 1 / (18 + 1) = 1 / 19 = 5.26%.
Decimal odds: (18 / 1) + 1 = 19. Multiply your stake by this to get the total return including your stake.
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